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		     代码如下:     >      HTML网页     <META HTTP-EQUIV="pragma" CONTENT="no-cache">     <META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate">     <META HTTP-EQUIV="expires" CONTENT="Wed, 26 Feb 1997 08:21:57 GMT">     或者<META HTTP-EQUIV="expires" CONTENT="0">     ASP网页     Response.Expires = -1     Response.ExpiresAbsolute = Now() - 1     Response.cachecontrol = "no-cache"     PHP网页     header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");     header("Cache-Control: no-cache, must-revalidate");     header("Pragma: no-cache");     JSP网页     response.setHeader("Pragma", "No-cache");     response.setHeader("Cache-Control", "no-cache");     response.setDateHeader("Expires", 1); |